idevices have never been developed to sound hifi, so we should not compare them directly to more specific equipment like squeezebox, etc. For them to produce moderately pleasing sound one needs a good dock station that can either have analogue outputs or, which is better, serve as digital transport further into a high quality DAC. For me a dock station option is the best one, it bypasses internal dac of an idevice and also provides power, which is essential since no one wants to interrupt playback to charge battery.